CN110266020B - Reactive power compensation device of power system and use method thereof - Google Patents
Reactive power compensation device of power system and use method thereof Download PDFInfo
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- CN110266020B CN110266020B CN201910653020.1A CN201910653020A CN110266020B CN 110266020 B CN110266020 B CN 110266020B CN 201910653020 A CN201910653020 A CN 201910653020A CN 110266020 B CN110266020 B CN 110266020B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention relates to the technical field of reactive power compensation of power systems, in particular to a reactive power compensation device of a power system and a using method thereof. A reactive power compensation device of an electric power system comprises a detection part for detecting a bus signal of a power grid, a signal transmission part, a reactive power compensation part for performing reactive power compensation on the power grid and a control part for adjusting the reactive power compensation. The detection part comprises a previous detection unit and a real-time detection unit; and the real-time monitoring unit detects the data of the power grid in the operation process in real time. The control part comprises a control end computer, a data analysis terminal and a storage terminal. The reactive compensation part comprises a normal reactive compensation unit and a standby reactive compensation unit, and the standby reactive compensation unit is used for compensating reactive power beyond the range of the normal reactive compensation model.
Description
Technical Field
The invention relates to the technical field of reactive power compensation of power systems, in particular to a reactive power compensation device of a power system and a using method thereof.
Background
With the rapid development and progress of society, the demand of human production and life for electric energy is increasing. Although the demand of human electric energy is still growing in quantity, with the continuous improvement and progress of life, the quality requirement of people on electric energy is also continuously improved, so that the important problem of the electric power system in the field of power supply is how to provide safe, reliable and economic electric energy for users.
Due to the continuous development and progress of the power electronic technology, a large number of related devices of power users are continuously connected to a power grid, and the power factors of the users gradually decline, so that reactive power compensation devices are widely adopted in the power grid.
The frequency conversion, rectification and the like are used in a large quantity in nonlinear characteristic devices or equipment, so that the power grid has larger harmonic interference, and the trend is more serious. The increasing harmonics result in a continuous degradation of the power quality of the grid. Because the devices connected into the power grid are various and complex and have strong uncertainty, the intensity of the harmonic wave has no certainty, which brings great challenges to the operation of reactive compensation.
When the existing reactive power compensation device carries out reactive power compensation, for some reactive power with a certain rule in a relatively stable time period, the problems that the reactive power compensation process is complicated and the compensation is unstable or overcompensation is caused by carrying out detection calculation for the next time or directly installing the reactive power compensation device with fixed capacity are solved.
Disclosure of Invention
The invention provides a reactive power compensation device of a power system, which aims to solve the problems of complicated reactive power compensation process, unstable compensation or overcompensation of the conventional reactive power compensation device.
The invention provides a using method of a reactive power compensation device of a power system, which is used for solving the problems of complexity, unstable compensation or overcompensation in the reactive power compensation process of the using method of the conventional reactive power compensation device.
The invention discloses a reactive power compensation device of a power system, which adopts the following technical scheme: a reactive power compensation device of an electric power system comprises a detection part for detecting a bus signal of a power grid, a signal transmission part, a reactive power compensation part for performing reactive power compensation on the power grid and a control part for adjusting the reactive power compensation;
the detection part comprises a previous detection unit, a real-time detection unit and a signal sending and receiving unit; the early detection unit is used for detecting data of the bus in the power grid operation process within a time period set by the control part; the real-time detection unit detects data of the power grid in the operation process in real time;
the signal transmission part comprises a first signal transmitting and receiving unit connected with the detection part and a second signal transmitting and receiving unit connected with the control part, and the first signal transmitting and receiving unit and the second signal transmitting and receiving unit are used for signal transmission between the detection part and the control part;
the control part comprises a control end computer, a data analysis terminal and a storage terminal, wherein the control end computer is mainly used for controlling the reactive power compensation part to be switched into a circuit, the data analysis terminal analyzes data collected by the early detection unit to establish a normal reactive power compensation model, and the storage terminal stores all data received by the control part;
the reactive compensation part comprises a normal reactive compensation unit and a standby reactive compensation unit, wherein the normal reactive compensation unit is constructed according to a normal reactive compensation model established by the data analysis terminal, and the standby reactive compensation unit is used for compensating reactive power beyond the range of the normal reactive compensation model.
The normal reactive compensation unit and the standby reactive compensation unit respectively comprise at least two groups of reactive compensation modules, and each reactive compensation module comprises an inductance submodule and a capacitance submodule.
The early detection unit and the real-time detection unit respectively comprise a voltage mutual inductance module and a current mutual inductance module, the voltage mutual inductance module is used for detecting voltage signals, and the current mutual inductance module is used for detecting current signals.
The earlier stage detecting element still include first electromagnetic switch and first microcontroller, first microcontroller with control end computer signal connection, real-time detection unit still include second electromagnetic switch and second microcontroller, second microcontroller with control end computer signal connection, wherein first microcontroller control first electromagnetic switch, second microcontroller control second electromagnetic switch.
The first signal sending and receiving unit and the second signal sending and receiving unit are wireless signal transmission modules.
The storage terminal adopts cloud storage.
A use method of a reactive power compensation device of a power system comprises the following steps:
the method comprises the following steps that firstly, a power grid data detection within m time periods is carried out on a power grid through a previous detection unit, and the detection is carried out repeatedly at least twice to obtain power grid initial data;
step two, the detected initial data of the power grid is transmitted to a control part through a signal transmission part;
analyzing the initial data of the power grid by a data analysis terminal in the control part to obtain an operation rule of the power grid in the m time period at each moment in the operation, establishing a normal reactive power compensation model aiming at the operation rule, and recording the maximum reactive power peak value; step four, assembling a normal reactive compensation unit according to the established normal reactive compensation model, and assembling a standby reactive compensation unit with reactive compensation capacity exceeding the maximum reactive power peak value according to the recorded maximum reactive power peak value;
step five, the normal reactive power compensation unit is put into use by the power grid, the early detection unit stops working, the real-time detection unit is put into use, and when the real-time detection unit detects that the power grid operates in the normal reactive power compensation model range within a continuous n time period, the power grid operates normally; when the real-time detection unit detects that the power grid continues for n time periods and exceeds an abnormal signal of a normal reactive power compensation model range, the abnormal signal is transmitted to the control part through the signal transmission part, a control end computer in the control part instructs the standby reactive power compensation unit to be put into the power grid, and when the abnormal signal disappears, the standby reactive power compensation unit is cut off from the power grid;
the data generated in all the steps are transmitted to the control part and stored by a storage terminal in the control part.
And n is less than m.
The invention has the beneficial effects that: the device standardizes the reactive compensation of the power grid by setting a detection part for detecting a power grid bus signal, a signal transmission part, a reactive compensation part for performing reactive compensation on the power grid and a control part for adjusting the reactive compensation. The power grid bus is continuously detected within m periods of time through the early detection unit in the detection part, detection data are sent to the control part, data are analyzed, and therefore a normal reactive compensation model is obtained, the normal reactive compensation unit is designed and installed according to the normal reactive compensation model, and therefore when the normal state of the power grid runs, the installed normal reactive compensation unit can accurately switch at each moment within m periods of time to perform accurate reactive compensation. And when the power grid operation exceeds the range of the normal reactive compensation model, the standby reactive compensation unit is started to perform reactive compensation. The device is adopted to carry out reactive compensation, so that the reactive compensation process is accurately switched, and the loss in the reactive compensation process is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a reactive power compensation device of an electric power system according to the present invention;
fig. 2 is a schematic structural diagram of an embodiment of a reactive power compensation device of an electric power system according to the present invention;
fig. 3 is a flow chart of a method for using the reactive power compensation device of the power system according to the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the reactive power compensation device of the power system of the present invention, as shown in fig. 1 and fig. 2, is a reactive power compensation device of a power system, including a detection portion for detecting a bus signal of a power grid, a signal transmission portion, a reactive power compensation portion for performing reactive power compensation on the power grid, and a control portion for adjusting reactive power compensation;
the detection part comprises a previous detection unit, a real-time detection unit and a signal sending and receiving unit; the early detection unit is used for detecting data of the bus in the power grid operation process within a time period set by the control part; the real-time detection unit detects data of the power grid in the operation process in real time;
the signal transmission part comprises a first signal transmitting and receiving unit connected with the detection part and a second signal transmitting and receiving unit connected with the control part, and the first signal transmitting and receiving unit and the second signal transmitting and receiving unit are used for signal transmission between the detection part and the control part;
the control part comprises a control end computer, a data analysis terminal and a storage terminal, wherein the control end computer is mainly used for controlling the reactive power compensation part to be switched into a circuit, the data analysis terminal analyzes data collected by the early detection unit to establish a normal reactive power compensation model, and the storage terminal stores all data received by the control part;
further, the reactive compensation part comprises a normal reactive compensation unit and a standby reactive compensation unit, wherein the normal reactive compensation unit is constructed according to a normal reactive compensation model established by the data analysis terminal, and the standby reactive compensation unit is used for compensating reactive power beyond the range of the normal reactive compensation model.
Further, the normal reactive compensation unit and the standby reactive compensation unit both comprise at least two groups of reactive compensation modules, and each reactive compensation module comprises an inductance submodule and a capacitance submodule.
Furthermore, the early detection unit and the real-time detection unit both comprise a voltage mutual inductance module and a current mutual inductance module, the voltage mutual inductance module is used for detecting voltage signals, and the current mutual inductance module is used for detecting current signals.
Further, earlier stage detecting element still includes first electromagnetic switch and first microcontroller, first microcontroller with control end computer signal connection, real-time detecting element still include second electromagnetic switch and second microcontroller, second microcontroller with control end computer signal connection, wherein first microcontroller control first electromagnetic switch, second microcontroller control second electromagnetic switch.
Further, the first signal sending and receiving unit and the second signal sending and receiving unit are wireless signal transmission modules.
Further, the storage terminal adopts cloud storage.
An embodiment of the method for using a reactive power compensation device of an electric power system according to the present invention is shown in fig. 3, and the method for using a reactive power compensation device of an electric power system includes the following steps:
the method comprises the following steps that firstly, a power grid data detection within m time periods is carried out on a power grid through a previous detection unit, and the detection is carried out repeatedly at least twice to obtain power grid initial data;
step two, the detected initial data of the power grid is transmitted to a control part through a signal transmission part;
analyzing the initial data of the power grid by a data analysis terminal in the control part to obtain an operation rule of the power grid in the m time period at each moment in the operation, establishing a normal reactive power compensation model aiming at the operation rule, and recording the maximum reactive power peak value; and data are shared in the range of the control part, and the control end computer puts reactive compensation modules with corresponding capacities into the normal reactive compensation unit at different moments in a period according to the normal reactive compensation model obtained by the data analysis terminal.
Step four, assembling a normal reactive compensation unit according to the established normal reactive compensation model, and assembling a standby reactive compensation unit with reactive compensation capacity exceeding the maximum reactive power peak value according to the recorded maximum reactive power peak value; in this step, the capacity of the standby reactive power compensation unit needs to be set in a prospective manner, and appropriate capacity expansion is performed in consideration of the increasing trend of the nonlinear characteristic devices.
Step five, the normal reactive power compensation unit is put into use by the power grid, the early detection unit stops working, the real-time detection unit is put into use, and when the real-time detection unit detects that the power grid operates in the normal reactive power compensation model range within a continuous n time period, the power grid operates normally; when the real-time detection unit detects that the power grid continues for n time periods and exceeds an abnormal signal of a normal reactive power compensation model range, the abnormal signal is transmitted to the control part through the signal transmission part, a control end computer in the control part instructs the standby reactive power compensation unit to be put into the power grid, and when the abnormal signal disappears, the standby reactive power compensation unit is cut off from the power grid;
in step five, the normal reactive compensation unit operates: in the m time period, the reactive compensation module in the normal reactive compensation unit is put into the reactive compensation module with corresponding capacity at each time of the m time period under the control of the model mode set by the control part.
The data generated in all the steps are transmitted to the control part and stored by a storage terminal in the control part.
Further, n is less than m.
The invention has the beneficial effects that: the device standardizes the reactive compensation of the power grid by setting a detection part for detecting a power grid bus signal, a signal transmission part, a reactive compensation part for performing reactive compensation on the power grid and a control part for adjusting the reactive compensation. The power grid bus is continuously detected within m periods of time through the early detection unit in the detection part, detection data are sent to the control part, data are analyzed, and therefore a normal reactive compensation model is obtained, the normal reactive compensation unit is designed and installed according to the normal reactive compensation model, and therefore when the normal state of the power grid runs, the installed normal reactive compensation unit can accurately switch at each moment within m periods of time to perform accurate reactive compensation. And when the power grid operation exceeds the range of the normal reactive compensation model, the standby reactive compensation unit is started to perform reactive compensation. The device is adopted to carry out reactive compensation, so that the reactive compensation process is accurately switched, and the loss in the reactive compensation process is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. The utility model provides an electric power system reactive power compensator which characterized in that: the system comprises a detection part for detecting a power grid bus signal, a signal transmission part, a reactive compensation part for performing reactive compensation on a power grid and a control part for adjusting the reactive compensation;
the detection part comprises a previous detection unit and a real-time detection unit; the early detection unit is used for detecting data of the bus in the power grid operation process within a time period set by the control part; the real-time detection unit detects data of the power grid in the operation process in real time;
the signal transmission part comprises a first signal transmitting and receiving unit connected with the detection part and a second signal transmitting and receiving unit connected with the control part, and the first signal transmitting and receiving unit and the second signal transmitting and receiving unit are used for signal transmission between the detection part and the control part;
the control part comprises a control end computer, a data analysis terminal and a storage terminal, wherein the control end computer is mainly used for controlling the reactive power compensation part to be switched into a circuit, the data analysis terminal analyzes data collected by the early detection unit to establish a normal reactive power compensation model, and the storage terminal stores all data received by the control part;
the reactive compensation part comprises a normal reactive compensation unit and a standby reactive compensation unit, wherein the normal reactive compensation unit is constructed according to a normal reactive compensation model established by the data analysis terminal, and the standby reactive compensation unit is used for compensating reactive power beyond the range of the normal reactive compensation model;
the use method of the reactive power compensation device of the power system comprises the following steps:
the method comprises the following steps that firstly, a power grid data detection within m time periods is carried out on a power grid through a previous detection unit, and the detection is carried out repeatedly at least twice to obtain power grid initial data;
step two, the detected initial data of the power grid is transmitted to a control part through a signal transmission part;
analyzing the initial data of the power grid by a data analysis terminal in the control part to obtain an operation rule of the power grid in the m time period at each moment in the operation, establishing a normal reactive power compensation model aiming at the operation rule, and recording the maximum reactive power peak value;
step four, assembling a normal reactive compensation unit according to the established normal reactive compensation model, and assembling a standby reactive compensation unit with reactive compensation capacity exceeding the maximum reactive power peak value according to the recorded maximum reactive power peak value;
step five, the normal reactive power compensation unit is put into use by the power grid, the early detection unit stops working, the real-time detection unit is put into use, and when the real-time detection unit detects that the power grid operates in the normal reactive power compensation model range within a continuous n time period, the power grid operates normally; when the real-time detection unit detects that the power grid continues for n time periods and exceeds an abnormal signal of a normal reactive power compensation model range, the abnormal signal is transmitted to the control part through the signal transmission part, a control end computer in the control part instructs the standby reactive power compensation unit to be put into the power grid, and when the abnormal signal disappears, the standby reactive power compensation unit is cut off from the power grid;
the data generated in all the steps are transmitted to the control part and stored by a storage terminal in the control part;
and n is less than m.
2. The reactive power compensation device of claim 1, wherein the normal reactive power compensation unit and the standby reactive power compensation unit each comprise at least two groups of reactive power compensation modules, and the reactive power compensation modules comprise an inductance sub-module and a capacitance sub-module.
3. The reactive power compensation device of claim 2, wherein the early detection unit and the real-time detection unit each comprise a voltage transformer module and a current transformer module, the voltage transformer module is used for detecting a voltage signal, and the current transformer module is used for detecting a current signal.
4. The reactive power compensation device of claim 3, wherein the early detection unit further comprises a first electromagnetic switch and a first microcontroller, the first microcontroller is in signal connection with the control terminal computer, the real-time detection unit further comprises a second electromagnetic switch and a second microcontroller, the second microcontroller is in signal connection with the control terminal computer, wherein the first microcontroller controls the first electromagnetic switch, and the second microcontroller controls the second electromagnetic switch.
5. The reactive power compensation device of claim 4, wherein the first signal transmitting and receiving unit and the second signal transmitting and receiving unit are wireless signal transmission modules.
6. The power system reactive power compensation device of claim 5, wherein the storage terminal employs cloud storage.
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| JP3244836B2 (en) * | 1993-02-09 | 2002-01-07 | 株式会社東芝 | Self-excited reactive power compensator |
| CN102005766B (en) * | 2010-11-19 | 2012-11-21 | 西安电力高等专科学校 | Control method for reactive compensation of network |
| CN102074963B (en) * | 2011-01-17 | 2013-01-02 | 北京清电华力电气自动化科技有限公司 | Intelligent reactive compensation comprehensive control device |
| CN106099945A (en) * | 2016-07-20 | 2016-11-09 | 中国电力科学研究院 | A kind of big data modeling of GA for reactive power optimization and abnormal scheme detection method |
| CN106877355B (en) * | 2017-03-30 | 2019-06-28 | 南方电网科学研究院有限责任公司 | Reactive compensation adjusting method |
| CN107086585A (en) * | 2017-06-28 | 2017-08-22 | 合肥市闵葵电力工程有限公司 | A kind of novel electric power system reactive power compensation system |
| CN107230987A (en) * | 2017-07-27 | 2017-10-03 | 广东电网有限责任公司惠州供电局 | A kind of distribution network var compensation Regional Synergetic control system based on mixing reactive power compensator |
| CN207503869U (en) * | 2017-12-14 | 2018-06-15 | 深圳市瑞智电力股份有限公司 | For the low-voltage combination switch of reactive power compensator |
| CN109038605A (en) * | 2018-08-03 | 2018-12-18 | 国网山东省电力公司经济技术研究院 | A kind of electric network reactive-load planing method considering voltage responsive characteristic |
| CN208656425U (en) * | 2018-09-26 | 2019-03-26 | 云南电网有限责任公司电力科学研究院 | A kind of intelligent powerless compensation device |
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Denomination of invention: A reactive power compensation device for power system and its application method Effective date of registration: 20220613 Granted publication date: 20210409 Pledgee: Mazhai Industrial Park sub branch of Bank of Zhengzhou Co.,Ltd. Pledgor: HUIYUAN ELECTRIC OMPLETE CO.,LTD. Registration number: Y2022980007565 |
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Date of cancellation: 20230616 Granted publication date: 20210409 Pledgee: Mazhai Industrial Park sub branch of Bank of Zhengzhou Co.,Ltd. Pledgor: HUIYUAN ELECTRIC OMPLETE CO.,LTD. Registration number: Y2022980007565 |